Resonance Frequency and Stiffness of Magnetic Bead Chain in Magnetic Field
Resonance Frequency and Stiffness of Magnetic Bead Chain in Magnetic Field
复制标题
磁场中磁珠链的共振频率和刚度
DOI：
10.2352/j.imagingsci.technol.2003.47.5.art00007
复制
发表时间：
2002
影响因子：
1
通讯作者：
S. Yamada
中科院分区：
文献类型：
--
作者：
Nobuyuki Nakayama;H. Kawamoto;S. Yamada
实验，理论和数值研究已经进行了评估在磁场中的磁珠链的共振频率和刚度。在螺线管线圈上形成的链被正弦波和脉冲波振动以推导谐振频率。它表现出弱的依赖性的磁通量密度和珠直径，因为这两个等效刚度和链长度都是大的根据磁通量密度的增加。这些特性得到了证实的理论考虑的基础上的势能最小化的假设和数值计算与离散元法。通过在倾斜重力场中观察链条的挠度，直接测量了链条的刚度，其结果与动力学推导的特性相符。结果表明，该链的共振频率为20-60 Hz，链顶静刚度为10 - 4 ~ 10 - 2 N/m。研究结果可望用于改进电子照相中的双组份磁刷显影子系统。
Experimental, theoretical, and numerical investigations have been carried out to evaluate resonant frequency and stiffness of a magnetic bead chain in the magnetic field. Chains formed on a solenoid coil were vibrated by the sinusoidal wave and impulse wave to deduce resonant frequency. It showed weak dependency on the magnetic flux density and the bead diameter, because both the equivalent stiffness and the chain length were large in accordance with the increase of the magnetic flux density. These characteristics were confirmed by theoretical considerations based on an assumption of potential energy minimization and a numerical calculation with the Distinct Element Method. Stiffness of the chain was directly measured by observation of chain deflection in inclined gravitational field and the results agreed with the dynamically deduced characteristics. It was concluded that the resonant frequency was 20-60 Hz and the static stiffness at the top of the chain was 10 -4 - 10 -2 N/m. The investigation is expected to be utilized for the improvement of the two-component magnetic brush development subsystem in electrophotography.